Instructions



.1 2'0 all whom it may Be it known that I, WALTER R. FORBUSH,

- :chusetts, have invented an Improvement in '5- Oomposition for Building Constructions, of

g which the following is a description.

This invention has for its object the pro- -=duction of 'acomposition which may be used in :varions forms for building constructions,

in #which shall'be light in weight, capable of re- I tremely durable, cheap and readily worked. The building materials commonly used, whethernatural, asstone, granite, marble,&c.,

' Liars open to many and various objections, on

a-account of their weight, friability,-disiutegration when exposed to the elements, and Lfor other reasons, some materials possessing 12o strength and durability, but having great -weight, while others of less weight have not ;the requisite resistance to pressure, heat or exposure;

525 cheap artificial composition which shall possees the greatest number of advantages with the iewest objectionable features I have discovered that diatomaceous or infusorial earth hen used as a base, combined with silicate oda in dry or gum form, and with a saline lut'ion, or combined with soluble glass and -.salt-,'will produce such a composition, which can be molded into various forms, or which 7 vmay be applied as a vplaster, either for ex- 5 eternal or internal construction, the silicate of l binder. 3-1.1

- ,Infusorial earth, as 'is well known, has a ,wef jmsw and is exceed- L ingly light in welg iume, but pos-.

' f gisessinglittle inherent cohesive power. When;

, thowever, it is mixed with a cementing subistance as a binder its weightis still far below briclior stone, volume for volume, and the mixture is porous or cellular in ahigh degree, while its cohesion is so increased that it is capable of resisting great pressure. By adding suitable materials thereto, the hard -if 'nesscanbe varied in a considerable degree, and the composition 'is [very durable,

uildingeonstruction,-cons earth silicate of -spda gand;

- "Bur gsruomcanon forming retest m ssijaeemateamcember 25,1894.

' 7 application filed in, 2. ma. summt mum. on imi.)

" of Boston, county of Suffolk, State of Massa- 1 5 2 sisting heat and pressure in a high degree, ex-

it 15- or artificial, as bricks, terra-cotta, or plaster,

r Y a In the courseof my experiments to make a I j soda'in either case acting as a cementing ing heat or the action of the elements in the a saline solution, and a substance which 0 mica y co ines with the mixture to The infusorial earthand the dry or gum silicate of soda are thoroughly ground and sold in that form.

If the compositionis to be molded into given forms suflicient saline solution, preferably hot, is added thereto to make the mass plastie, and it is then compressed and dried. If it is to be used as plaster the plastic mass :The commercial soluble glass is readily can be reducedtothe form crating the water.

of the silicate of soda and solution.

,When' molded or used asaplasterthe here-' inbefore described ingredients in substanfriable nor liable to fraeture, and whichi's substantially fireproof. .Wheu exposed to: heat it will uot (burn nor crack, and ispar no etrjiental eftectthereuponiif Z hileljhave'herein described proportio f the various; ingredients which give i most filmaotory results, ;I ,do not limit-myself to;

or gum form may housed, in connaia'tion with 5 5 mixed one with the other, and they may b l is applied in usual manner and permitted I to dry in place. I prefer the hot saline solo-. 9 tion, as the g-ummy silicate ofsoda is more :i; readily soluble therein.

obtainable and comparatively cheap, and-it ofagumbyevap Egualparts oginfusorialegaih audsoluble lass and from onewe t o one-m l'dfi part oi; Eodium chloride make a very .80 1 useful-and ea 15 ac cry :11 sition, and I being substantially; equal in volume tojtha't I n 'tially the proportions set forth make a light, 0-

durable, and strong composition,which is not I ticularly useful in the construction-of fire- 5 m0 b ,and exposure to the eleifibits 

